1. In television technology, the signal that describes (a) the distribution of brightness levels within the image and (b) the equation for deriving that information from the camera output. [After SMPTE]
2. In composite color television, a signal that has major control of the brightness.
Note: Luminance signal is a linear combination of gamma-corrected primary color signals. [After IEEE 100]… (Read More →)

See superluminescent LED.

The rate of flow of radiant energy.
Note: Luminous flux is expressed in lumens (cd sr).

See candela.

In the Internet, a participant in a chat room or a subscriber to a mailing list or newsgroup who passively observes but does not actively participate in the exchange. [Bahorsky]

Passive participation in (i.e., monitoring) the activities of a mailing list, a newsgroup, an IRC channel, a video connection, or any other Internet communication device.
Note: Lurking is generally carried out for the purpose of nondirected information gathering or to allow a new user to first understand the focus and the manners of a discussion group. [Bahorsky]

A World Wide Web browser that provides a character-based user interface to hypertext-based information.
Note: Lynx can display only character-based portions of the hypertext-based information.

See n-ary code.

See n-ary code.

Media - Delivery Network Gateway